Office supplies; artists and teachers materials – Teaching material
Patent
1991-04-24
1993-08-17
Burke, Wallace R.
Office supplies; artists and teachers materials
Teaching material
Patent
active
D03384926
REFERENCES:
patent: D248885 (1978-08-01), Pogue
patent: D280747 (1985-09-01), Stasney
patent: D293120 (1987-12-01), DePrino
patent: 4440457 (1984-04-01), Fogelman et al.
patent: 4804185 (1989-02-01), Noble et al.
McNall John
Rooksby Howard
Brown Melody
Burke Wallace R.
Public Computer Systems Incorporated
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